After spending the winter far apart in Eastern Sudan and Western Saudi Arabia respectively, Boris and Irina (two of our satellite-tagged Sociable Lapwings) have apparently reunited in Azerbaijan during their long journeys home to Kazakhstan.
In our last update on March 15th, we had followed Boris (on his rapid migration north from Sudan) to a location in Syria close to the Iraq border which he arrived at on Monday, March 10th. We now know he stayed there until the morning of Friday, March 14th but then travelled on, and by the afternoon of Sunday, March 16th, he’d arrived in Eastern Azerbaijan, near the west coast of the Caspian Sea.
We had also followed Irina, who stayed longer on her wintering grounds (in Saudia Arabia) than Boris but she set off from there on March 6th and by March 10th, she had arrived in Iraq near the Syrian border. We now know she stayed there until Friday, March 14th but then pressed on and by the afternoon of Sunday, March 16th, she too had arrived in the same area of Azerbaijan that Boris was in.
While it will require further survey and monitoring in the future, it looks highly likely that we have now discovered an important Spring migration staging site for Sociable Lapwings in Azerbaijan.
Historical records in our database have indicated that this area of Azerbaijan might be a last Spring stopover site for Sociable Lapwings before they cross the Caspian and head on to the Emba valley in Kazakhstan. Our knowledge of regular Spring staging sites is very restricted but now this location in Azerbaijan and another site in Syria where c. 2,000 birds were located in 2007 appear to be regular staging sites. As indications are that both Boris and Irina passed close to or through this area of Syria this year, it is indeed possible that they might have stopped at the Syrian location for a few hours before moving on non-stop to Azerbaijan too.
It is likely that there are not many large stopover sites for Sociable Lapwings on their Spring migration back to Kazakhstan. The journey home is rapid and the entire route through Central Asian semi-deserts in Spring is much wetter throughout, offering extensive suitable resting and feeding habitat that is unavailable in the Autumn.
As of Monday, March 24th, Boris and Irina are both still staging in Azerbaijan on the East Caspian coast.
The great image at the head of this post by Philipp Meister is of a flock of Sociable Lapwings encountered at Gobustan, Azerbaijan on 6th April 2006.
In February this year our Sociable Lapwing Study team received news of another important Sociable Lapwing migration discovery, from the same area of Azerbaijan, that was made in Autumn 2013.
On 20th October 2013 Pedro Romero Vidal recorded a flock of 45 Sociable Lapwings at Lake Hadzhibagul and on November 7th he found another flock of 15 there. Pedro regularly counts waterbirds at the lake to record their numbers and diurnal activity patters for his MSc thesis at Greswald University, Germany. On both occasions the birds he encountered were feeding on muddy ground with small pools.
Of great interest to us was that among the 45 birds he encountered on October 20th, no less than four were colour-ringed. One carried a blue and a white ring, but in general, viewing conditions were not sufficient to read the full combinations. However, as the majority of birds carrying rings now must come from the Korgalzhyn region of Kazakhstan, and as four ringed birds were seen together, it seems likely that these birds were ringed in Central Kazakhstan near Lake Tengiz.
This is another piece of the jigsaw in our quest to reveal the Sociable Lapwings’ migration routes. It suggests that some birds, and perhaps only in some years, do not take a detour around the North shore of the Caspian, but cross it directly from the West Kazakhstan or North Turkmenistan coast.
Until now this has only been proven for the bird’s Spring migration route.